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/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file chmemcore.h
* @brief Core memory manager macros and structures.
*
* @addtogroup oslib_memcore
* @{
*/
#ifndef CHMEMCORE_H
#define CHMEMCORE_H
#if (CH_CFG_USE_MEMCORE == TRUE) || defined(__DOXYGEN__)
/*===========================================================================*/
/* Module constants. */
/*===========================================================================*/
/*===========================================================================*/
/* Module pre-compile time settings. */
/*===========================================================================*/
/**
* @brief Managed RAM size.
* @details Size of the RAM area to be managed by the OS. If set to zero
* then the whole available RAM is used. The core memory is made
* available to the heap allocator and/or can be used directly through
* the simplified core memory allocator.
*
* @note In order to let the OS manage the whole RAM the linker script must
* provide the @p __heap_base__ and @p __heap_end__ symbols.
* @note Requires @p CH_CFG_USE_MEMCORE.
*/
#if !defined(CH_CFG_MEMCORE_SIZE) || defined(__DOXYGEN__)
#define CH_CFG_MEMCORE_SIZE 0
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if CH_CFG_MEMCORE_SIZE < 0
#error "invalid CH_CFG_MEMCORE_SIZE value specified"
#endif
/*===========================================================================*/
/* Module data structures and types. */
/*===========================================================================*/
/**
* @brief Memory get function.
*/
typedef void *(*memgetfunc_t)(size_t size, unsigned align);
/**
* @brief Enhanced memory get function.
*/
typedef void *(*memgetfunc2_t)(size_t size, unsigned align, size_t offset);
/**
* @brief Type of memory core object.
*/
typedef struct {
/**
* @brief Next free address.
*/
uint8_t *nextmem;
/**
* @brief Final address.
*/
uint8_t *endmem;
} memcore_t;
/*===========================================================================*/
/* Module macros. */
/*===========================================================================*/
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if !defined(__DOXYGEN__)
extern memcore_t ch_memcore;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void _core_init(void);
void *chCoreAllocAlignedWithOffsetI(size_t size,
unsigned align,
size_t offset);
void *chCoreAllocAlignedWithOffset(size_t size,
unsigned align,
size_t offset);
size_t chCoreGetStatusX(void);
#ifdef __cplusplus
}
#endif
/*===========================================================================*/
/* Module inline functions. */
/*===========================================================================*/
/**
* @brief Allocates a memory block.
* @details The allocated block is guaranteed to be properly aligned to the
* specified alignment.
*
* @param[in] size the size of the block to be allocated.
* @param[in] align desired memory alignment
* @return A pointer to the allocated memory block.
* @retval NULL allocation failed, core memory exhausted.
*
* @iclass
*/
static inline void *chCoreAllocAlignedI(size_t size, unsigned align) {
return chCoreAllocAlignedWithOffsetI(size, align, 0U);
}
/**
* @brief Allocates a memory block.
* @details The allocated block is guaranteed to be properly aligned to the
* specified alignment.
*
* @param[in] size the size of the block to be allocated
* @param[in] align desired memory alignment
* @return A pointer to the allocated memory block.
* @retval NULL allocation failed, core memory exhausted.
*
* @api
*/
static inline void *chCoreAllocAligned(size_t size, unsigned align) {
void *p;
chSysLock();
p = chCoreAllocAlignedWithOffsetI(size, align, 0U);
chSysUnlock();
return p;
}
/**
* @brief Allocates a memory block.
* @details The allocated block is guaranteed to be properly aligned for a
* pointer data type.
*
* @param[in] size the size of the block to be allocated.
* @return A pointer to the allocated memory block.
* @retval NULL allocation failed, core memory exhausted.
*
* @iclass
*/
static inline void *chCoreAllocI(size_t size) {
return chCoreAllocAlignedWithOffsetI(size, PORT_NATURAL_ALIGN, 0U);
}
/**
* @brief Allocates a memory block.
* @details The allocated block is guaranteed to be properly aligned for a
* pointer data type.
*
* @param[in] size the size of the block to be allocated.
* @return A pointer to the allocated memory block.
* @retval NULL allocation failed, core memory exhausted.
*
* @api
*/
static inline void *chCoreAlloc(size_t size) {
return chCoreAllocAlignedWithOffset(size, PORT_NATURAL_ALIGN, 0U);
}
#endif /* CH_CFG_USE_MEMCORE == TRUE */
#endif /* CHMEMCORE_H */
/** @} */
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